Error: COMMIT Or ROLLBACK TRANSACTION Statement Is Missing. Why?

Hello:
I am implimenting the creation of sequence numbers .I use an insert proc on a table that generates the numbers using an identity field:
procedure usp_createidentity

begin transaction

insert into [tblOrderNumber] with default values

rollback ' done so no records in this table

select @OrderNumber = scope_identity()

I call this from another proc that inserts values into my order table:


procedure usp_Insert @OrderNumber int
as

SET XACT_ABORT ON;

BEGIN TRY

BEGIN TRANSACTION


EXEC usp_GetNewOrderNumber @OrderNumber = @OrderNumber output
INSERT INTO [dbo].[tblOrder] ([OrderNumber]) values (@orderNumber) ' inserts value from other stored proc


COMMIT TRANSACTION

END TRY

BEGIN CATCH

if (XACT_STATE() = -1)

ROLLBACK TRANSACTION

else

if (XACT_STATE() = 1)

COMMIT TRANSACTION
END CATCH

Here is the problem. When I run usp_Insert I get the following: Error 266 Transaction count after EXECUTE indicates that a COMMIT or ROLLBACK TRANSACTION statement is missing. Previous count = 1, current count = 0.

This refers to the usp_GetNewOrderNumber that is called inside the other proc as shown above.

The problem does not happen if I put each statement in usp_Insert in its own try/catch. transaction statements.

Maybe it has something to do with the rollback call in the usp_getneworder.

What do I need to do to get rid of this. problem and still run these within one try/catch trans statement set.

Thanks