error 500 internal server error on movable type

[spoiledbrattine]

i have movable type installed on the server (CMS). When I try to save an entry by clicking the "Save" button as normal I get an 'Internal Server Error (500)'.

However, if I click the "Preview" button and then on the next screen click "Save this entry", it will save the entry (or changes).

Everything was working fine until today (I did not change permission nor make any changes on server to files etc.)

I contacted the hosting comapny and they say nothing unusual. I am very perplexed about this.

Any advice/ideas as quickly as possible would be appreciated!

[neutro]

check here for fix
http://forums.cpanel.net/showthread.php?t=40896