Copied WP Site to new server can't get Admin to work

My old free hosting server went down and so I am trying to get my wordpress site back up on a new paid hosting server but can’t seem to get it working right.

1. I copied all contents of old WP site over to new server.

2. I exported then imported the database from the old to new server

3. I modified the wp-config.php file to properly match new server settings.

4. The URL changed from old to new server host so I ran a find and replace on database script prior to uploading database to new server

The site seems to run with exception to a few images, but the biggest problem is that I can’t get the WP Admin working for the site.

I get the login page and it tells me correctly if the login is incorrect; however, if I put in correct credentials I get a blank page only.

Any insight would be much appreciated- I’m a new to wordpress in general but have some programming experience.

Thanks much