not terribly familer with PSK 63 in particular but geting a numbe rof the digtal mode to transmt is sometime a battle with your PC internal configuaration had loads of truobel sart JT65 on same day I use PSK 31
first most somewhere I have seen having PSK 63 on has other modes like PSK 31 or SSTV or even CW trying one of them and see if you interface tranmit I have of All thing teh SSTV or CW modes are good to start with since a lot programing sem to have started with one or the other and expanded their interface
or is the problem I can hear the mode on the your speaker but the tramitter is not being keyed Likely solation is that the program need to be told comport number to find the keying function, In a sense of self protectiveness I'll refrain form saying how it it took me to figure that one out
KB9RQZ@amsat.org if I can help
depending on your timelines I do come down to greenbay some fridays for temple services and Prehaps if you have the time to wait thinext weekend my wife still has a craft show round here but perhaps th e week after I could to meet and help you a bit more
nothing lowly about us techs if it were not for us a lot of thing would never get tried