Priniting issue in WEP HQ 2650 Printer

Dear All,

     We are facing problem in printing in the WEP HQ 2650 Printer (Heavy Duty Dot Matrix). The problem is mainly with SWIN Output Device type & Page Format. The printing is coming in X_65_80 &  X_90_120 correctly but not in higher formats like X_120_150 which are desired.

Is there any better way to print in the model mentioned.

In anticipation of your reply.