Unexpected Error when trying to delete attachment

I am having a user reporting "unexpected error" when trying to delete the attachment from a list item. I have gone through the log files,but not able to find any trace of the error. I am kind of new to sharepoint. This is happening in sharepoint 2007. This is happening when I try to delete a file from a item field and click on ok. Its spinning for quite amount of time and throwing the error. Please help me with this.

Thanks, Sudheer