Problem with CTelephony class

[abernues]

Hi:

I'm developing a Symbian C++ application to my nokia 3650. I want to send DTMF tones so that I use this function that belongs to etel3rdparty.h

iTelephony->SendDTMFTones(iStatus, KTones);

But when I try to run my application into the mobile phone this warning appears: system error!

I'm sure this error is caused by CTelephony class because if I erase this class my application runs well.

why can't I use this class in nokia 3650?

Thanks in advance.

[symbianyucca]

because this class is not defined for OS 6.1 phones, maybe ?

yucca

[abernues]

Ok, thanks

Do you know anyway to send DTMF in nokia series 60 mobiles????

I've used etelmm.h (sdk UIQ 2.1) but I don't get anything...