What error message are you getting?
Try putting this in your batch and comparing to the original stored procedure:
SELECT RIGHT(@MYQUERY,50)
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden