Getting Error when using Calling option with WP7 toolkit

Question

Please Help me to solve this Problem. I have searched quite a lot of time for finding a solution for this problem. Please spare with me if i have posted this question in the wrong place but do help me to find a solution for the below given problem. I have explained it briefly there.

Thanks in Advance
Praveen

Hi,

Im very new to this development. I started to develop WP7 application only a few weeks ago. I am getting this strange error. without using the Windows Phone 7 Toolkit reference i can trigger the call option from my emulator. But when i give the reference to the WP7 toolkit,i got the below error



then i added the Windows.System.Phone for the GestureEventsArgs (Refer Below), i dont get any error, build was successful and when testing in the emulator i was not able to get the call option enabled.