Use T68 to select a system

I installed TWS and T68. I also subscribe a system at C2. When I try to use T68 to select a C2 system, I got a message that “Could not get systems to trade from signal generator.” after I give my email and password of C2. What’s the matter with this?

Thank you,

-Ying [LINKSYSTEM_30629916]

I figure out the reason. I have special char in my password.