I am using SDK 2.1, nokia 5110, Windows 2000 and VB6.

When i tried to run the vb sample named "sms" in Nokia PC Connectivity SDK 2.1, I pressed the button named "SMS Settings" to get the setting of my Nokia 5110 connected to my PC via com1 connection,the error occurred which said "Error number 7690 in Form_refresh". I know the connection between the 5110 mobile phone and my PC work because I can run another similar application perfectly.
Any ideas folks?
I get this error in all the sample programs.