Please help me in resolving the error: The definition of object 'trigger name' has changed since it was compiled

I'm trying to upgrade SQL Server 2000 to 2008 R2. After the upgrade I'm getting the below error when trying to execute the stored procedure.This is executing in SQL Server 2000 without any issues, but when running on 2008r2 it shows below message.

Msg 2801, Level 16, State 1, Procedure 'trigger name' , Line 215 The definition of object 'trigger name' has changed since it was compiled.

Please help..