Execute SQL Task Parameterized SP

I have a Stored Procedure that takes in a Bit Parameter (0/1) that i want to execute from a Execute SQl Task. The value for the parameter needs to come in from a user defined variable.

The Exec SQL Task command is Exec spName ?

I have added a parameter of Type Variant_Bool Name as 0 and Size as 1.

The ByPassPrepare is set to false.

the SP Executes but it does not seem to pick up the variable that i set, any ideas?

Regards, Dinesh