USB Sabertooth 2*32 with simply serial mode

I need help regarding Sabertooth 232,i tried to use it with using Legacy simply serial mode where i am giving it 0 to 255 as per motor 1 or 2 even though it is not rotating motor properly,DIP switches are set properly for assurance i checked it on DEScribe software,sometimes it rotate randomly at some discrete datas like 44,102,10 etc.
Also I used to work with Sabertooth 2
25 where i using it with simply serial mode but that methode is not working properly.
For checking the Sabertooth i used it with Serial Plain Text mode and it is working properly.

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