Straight Line tool Stops working after a while?

[Death_SpecteR]

At first the line is as long as you want it, then later on it gets shorter and shorter till it basically doesn't work anymore.
I can't draw straight lines.
I use my mouse and cyber tablet z8.
Just an example, like it wont go any farther than this.
I'm doing stuff like this with it.
Art Rage 4.5.10 64 bit, full version.


Thanks anybody.