Critical Program Error

Hi ,

I am working on sap automation using C#. when I Enter  Bex analyzer Material Master key values ( ref: below Change Variable Window) using code it is working till some values . if i increase the no of values in that window it is giving "Critical Program Error the Program will terminate now".

can anybody please tell me the solution ?. do i need to change any security settings or cache settings ?? in the log files it has error "CSecMgr::Check_Cache: Invalid security level! (1)"

can anybody please provide us solution ??

thanks in advance .