OK Update. I'm pretty sure its a configuration/initialsation error.
I'm thinking Dip Switch settings on the printer against the COM1 settings in control panel... im not sure what they should be or weather i should just have to experiment.
Now to make this more ...... interesting.... i realised yesterday, after giving up with this one, that i had tried 2 other trial versions of paid POS systems. Neither were suitable, but both printed properly. So i retried those ones. It turns out that one of them, seems to init the printer in someway.
If i run that program first, even if just to quit out, then Lettronics PCTill works properly from then on. Untill the machine is rebooted, then its crap again, untill i start this rival program...
Now the rival program is not suitable for the job and i need to get Lettronics PCTill working before the 30 day trial (29 days left) of this other program expires.
Any thoughts now?