从代码运行时存储过程超时，但不从查询工具运行

I am trying to figure out why a stored procedure call takes seconds in a SQL server express query window, but when I run call the stored procedure in code the query TIMES OUT. We are using sql server 2008. I know it is hard to say exactly what is going on without seeing the stored procedure. I'm just hoping this is a known issue. Any guidance is much appreciated.I am trying to figure out why a stored procedur