Cannot Access my Admin at All-Fatal Error

Hi,

My site was moved to a new server and shortly after I’ve been shut out of my admin of my WordPress site.

This is the error I’m getting:

Fatal error: Allowed memory size of 50331648 bytes exhausted (tried to allocate 286186 bytes) in /home/airman28/public_html/wp-content/plugins/w3-total-cache/lib/W3/ObjectCache.php on line 211

So I tried to rename the plugin diectory and I get this error:

W3 Total Cache Error: some files appear to be missing or out of place.

Can anyone help with a solution? Is there a safe way to reinstall the plugin or do I have to delete it first?

Thank you.

Ken

http://wordpress.org/extend/plugins/w3-total-cache/