FaceBook error messages is my problem

Hi all,
I need your help with facebook. I am getting an error which can be seen below when I tried to perform certain tasks e.g. deleting an app or viewing older posts. I am no expert and can´t find anything on the website to help me. Any ideas would be great
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SIMBAR={D90DF1DE-F024-11E0-A8D0-5CAC4CEBA679}; GTB7.3; BTRS124865; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)
Timestamp: Sat, 5 May 2012 16:26:31 UTC
