Paintstormstudio.com

I just bought the software.But when I draw,the first contact become a big point,like a tadpole.Does anybody had this problem?How did you fix it?I work with Windows 7 system and Wocam tablet,I didn't change any options include the tablet.Please help me.

I am sure that it can be fixed by the installation of some another version of tablet drivers. Wacom drivers are very whimsical and have many glitches