Sending SMS through Nokia 6230i

[Debojit Nag]

Hi all
I have faced a problem during Sending SMS through Nokia 6230i. I am using NetBeans4.0 with mobility pack 4.0,WTK 2.2,Nokia 6230i with Nokia Connectivity Framework(NCF).

I am getting class not found exception while using Nokia 6230i emulator but the same code runs quite nicely with sun's default color phone.
WMA optional package is also imported. Please let me know what is source of exception!

I am getting a class not found Exception for Nokia 6230i for the following line using WMA API:
MessageConnection conn = (MessageConnection) Connector.open(addr);


Thanks in advance.
Debojit