eShop plugin checkout processing takes 235sec, order cost corrupted

Greetings,

I’ve got a problem with checkout proccess:
– when the order form was filled and confirmed by “proceed to checkout” button,
– request took 235 sec (yes, it’s about 4 min),
– then message “Please wait, your order is being processed…, If you are not automatically redirected, please use the Proceed button.” appeared without auto-redirection,
– pressed “Proceed” button and got “Thank for the order” page, request took 1.55 sec
– order apperead in back-office with “Awaiting Payment” status and corrupted order cost, it look like shipping cost replaced product price for all order items.

Do you have any suggestion why checkout process are so long (4 min)? And what is wrong with order cost details in eshop admin area?

Configuration: WP 2.7 with Tarski 2.4.
URL: https://www.faber-electro.ru
eShop with Cash Merchant Gateway
Use Russian letters for product SKU

Checkout HTTP Request/Response:

(Request-Line)
POST /shopping-cart/checkout/?action=redirect HTTP/1.1
Host https://www.faber-electro.ru
Referer https://www.faber-electro.ru/shopping-cart/checkout/
Cookie eshopcart=first_name%3Ddd%7Clast_name%3Dff%7Cemail%3Dd.kharitonov%40gmail.com%7Cphone%3D1111%7Caddress1%3Dddff%7Ccity%3Dggggg%7Cstate%3DBlg%7Czip%3D123%7Ccountry%3DRU%7Cship_name%3Ddd+ff%7Cship_phone%3D1111%7Cship_address%3Dddff%7Cship_city%3Dggggg%7Cship_state%3DBlg%7Cship_postcode%3D123%7Cship_country%3DRU%7Camount%3D52%2C053.60%7Citem_name_1%3D%D0%92%D0%A0%D0%A3-1%7Ceshopident_1%3DVRU1Option4365%7Cquantity_1%3D5%7Camount_1%3D10%2C408.72%7Citem_number_1%3DVRU1+%3A+IP54%2C+1800%D1%85450%D1%85450%7Cpostid_1%3D365%7Cnumberofproducts%3D1%7Ceshop_payment%3Dcash%7Csubmit%3D%D0%9F%D0%BE%D0%B4%D1%82%D0%B2%D0%B5%D1%80%D0%B4%D0%B8%D1%82%D1%8C+%D0%B7%D0%B0%D0%BA%D0%B0%D0%B7+%C2%BB%7Ccustom%3D20090414203202%7Cshipping_1%3D10; wp-settings-time-1=1239726572; wp-settings-1=m0%3Do%26m1%3Dc%26m2%3Dc%26m3%3Do%26m4%3Do%26m5%3Dc%26m6%3Dc%26m7%3Dc%26m8%3Dc%26hidetb%3D1%26imgsize%3Dthumbnail%26align%3Dleft%26editor%3Dtinymce%26m9%3Do%26urlbutton%3Durlfile; __utma=195187899.148853861931439200.1239605598.1239605598.1239605598.1; __utmz=195187899.1239605598.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); wordpress_logged_in_82bb845ebf4092e3f43a95a0bd3bc874=admin%7C1240933981%7C6ee5279bfa731ab7cc0d6df47e8faaf6; WRUID=1203559390.589255514; wordpress_test_cookie=WP+Cookie+check; PHPSESSID=33c23b58328c06ad6d933cf93273b7fc
Content-Type application/x-www-form-urlencoded
Content-Length 877

HTTP/1.1 200 OK
Date Tue, 14 Apr 2009 16:32:39 GMT
Server Apache/2.2.11 (FreeBSD) mod_ssl/2.2.11 OpenSSL/0.9.7e-p1 DAV/2 PHP/5.2.9 with Suhosin-Patch
X-Powered-By PHP/5.2.9
Expires Sun, 01 Jul 2005 00:00:00 GMT
Cache-Control no-cache, no-store, must-revalidate
Pragma no-cache
X-Pingback https://www.faber-electro.ru/xmlrpc.php
Last-Modified Tue, 14 Apr 2009 16:32:40 GMT
Set-Cookie eshopcart=shipping_1%3D10%7Cfirst_name%3Ddd%7Clast_name%3Dff%7Cemail%3Dd.kharitonov%40gmail.com%7Cphone%3D1111%7Caddress1%3Dddff%7Ccity%3Dggggg%7Cstate%3DBlg%7Czip%3D123%7Ccountry%3DRU%7Cship_name%3Ddd+ff%7Cship_phone%3D1111%7Cship_address%3Dddff%7Cship_city%3Dggggg%7Cship_state%3DBlg%7Cship_postcode%3D123%7Cship_country%3DRU%7Camount%3D52%2C053.60%7Citem_name_1%3D%D0%92%D0%A0%D0%A3-1%7Ceshopident_1%3DVRU1Option4365%7Cquantity_1%3D5%7Camount_1%3D10%2C408.72%7Citem_number_1%3DVRU1+%3A+IP54%2C+1800%D1%85450%D1%85450%7Cpostid_1%3D365%7Cnumberofproducts%3D1%7Ceshop_payment%3Dcash%7Csubmit%3D%D0%9F%D0%BE%D0%B4%D1%82%D0%B2%D0%B5%D1%80%D0%B4%D0%B8%D1%82%D1%8C+%D0%B7%D0%B0%D0%BA%D0%B0%D0%B7+%C2%BB%7Ccustom%3D20090414203202%7CRefNr%3D207948460849e4ba829d8ab%7Cppsubmit%3D%D0%BF%D0%B5%D1%80%D0%B5%D0%B9%D1%82%D0%B8+%D0%BA+%D0%BE%D1%84%D0%BE%D1%80%D0%BC%D0%BB%D0%B5%D0%BD%D0%B8%D1%8E+%D0%B7%D0%B0%D0%BA%D0%B0%D0%B7%D0%B0+%C2%BB; expires=Wed, 14-Apr-2010 16:32:40 GMT
Keep-Alive timeout=5, max=100
Connection Keep-Alive
Transfer-Encoding chunked
Content-Type text/html; charset=UTF-8