Hi,
CRM 4.0 disabled option to add parameters in query string.
to change this option need to change register.
goto Start - Run write -> regedit ( register)
Edit the registry in:
HKEY_Local_Machine\Software\Microsoft\MSCRM
Add a new DWORD
"DisableParameterFilter"
set value to 1.
this changes will help to add parameters in query string.
Enjoy,
Rami Heleg