Airport express & VPN client and iTunes & Printer

I have an airport express base station and using it primary to have wireless internet connection for my MacBook Pro in my office.
Combination of airport express and Cisco VPN client (which is required for me to connect onLINE) is working great.

Airport express is working good - I can print wirelessly and stream music from my iTunes with no problems!

In the moment when I go onLINE (means that additionally VPN Client is active) I am not able to get my remote speakers active on the iTunes and also printer can not be found anymore. I have also noted that during that time AIRPORT ADMIN UTILITY is not able to detect my device.

Can someone give me any suggestion-s to resolve this problem-s !??

thanks!