Open web browser via Citrix

[jen jin]

We are using PowerBuilder 7.03. Citrix is in Windows 2000 machine.

We want to add new function to open web browser in PowerBuilder.
I know there are two ways to open browser.
One is calling HyperlinkToUrl(ls_url)function and the other one is
calling ShellExecute() external function.
Since we want to RE-USE the web browser, using the ShellExecute()
external function might be the only choice.
It is working fine in my local machine.

When I was running the application via Citrix Server, the result was
not right.
When I click the button, IE is up.
When I try to click another button linking another web site, the IE
screen didn't link to new address. It didn't refresh at all.

Does Citrix server need any different setup?
Any idea???

Thanks in advance