The TX does NOT have a conversion issue. If you have a "dual conversion" crystal is it, that is your problem. It needs a TX crystal and they are different than RX crystals.
Examples:
http://www2.towerhobbies.com/cgi-bin...I=LXNY38**&P=7
http://www2.towerhobbies.com/cgi-bin...I=LXPY03**&P=7
Can't use same crystal in both positions.