Cannot Attach to Transaction

I am using the ODBC connection to attach to a 5.x database... It works on all of my other servers from AIX to Windows 2000... But on one Informix 5.x server I get the following error when I try to test the connection to Informix 5.x Server Using ODBC... Cannot Attach to Transaction Here is the rest of the information associated with the error... ### ON THE WINDOWS 2000 MACHINE DBPING RETURNS THE FOLLOWING: SQLAllocEnv Successful SQLAllocConnect Successful There was an error within SQLConnect! SQLState = S1000 Native Error = -529 Error Message = [Informix][Informix ODBC Driver][Informix]Cannot attach to transaction. ### NATIVE ERROR RETURNS THE FOLLOWING INFORMATION ON SERVER admin:/sw/informix: finderr -529 -529 Cannot attach to shared memory. This error message appears prior to Version 6.0. Your application program is unable to initialize its connection to the database server because you are using a shared-memory implementation. Either the database shared memory has not been initialized, or the maximum number of users has already started using the system. Check the accompanying ISAM error code for more information. -529 Cannot attach to transaction. This error message appears beginning with Version 6.0. Your application program is unable to initialize its connection to the database server because you are using a shared-memory implementation. Either the database shared memory has not been initialized, or the maximum number of users has already started using the system. Check the accompanying ISAM error code for more information. ### DEVELOPEMENT DOCUMENTATION ERROR INFORMATION BELOW... SQLSTATE S1000 (General error) An Informix ODBC Driver SQLSTATE value, which ranges from S1000 to S19ZZ. For example, SQLSTATE S1001 (Memory-allocation failure) indicates that the call from the driver manager to the driver-level SQLAllocEnv returned SQL_ERROR, and the henv from the driver manager was set to SQL_NULL_HENV. SQLSTATE Error Message Can be returned from 01000 General warning All Informix ODBC Driver functions except: SQLAllocEnv SQLError