[Plugin: Contact Form 7] Contact form 7 installation error

Hi,

I have a problem with the installation of Contact form 7.
When uploading/activating the plugin, i receive this error:

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 30720 bytes) in /home/*****/domains/*****/public_html/wp-admin/menu.php on line 37

I tried it several times, but i keep getting that error, so installation fails…

What am i doing wrong here?
Tnx in advance.

Grtz.