Citrix Question

Just wondering if anyone out there experts on the problem that i have. Here is a prblem.
We run citrix metaframe 1.8, and we have an application (Ex. ABC)installed on the citrix server. Every one who’s connecting and has no problem about printing; except one user can’t print on (ex. ABC)application, but she can print anything else (Ex. outlook, word…ect..) They all are running thin client on the PC. How do i fix inorder this user connect to her defualt printer, and she is able to print in the thin(ABC)application. This is greatly appreacited.
Thanks
-Don