problem with Sony T70 video

[raiteens]

Hi.
I bought my Sony T70 and all works fine before i had taken a video.this video was about 15 minutes long in ''Fine'' settings. But then i saw that my video had only 9:59 min long.i take another video and saw that after 9:59 minutes there becom a standby mode.my Memory stick is 4 gb and it is empty.and i cant see in settings any option to switch off this limited video lenght.and nowhere is written that video in ''Fine'' can take only max 9:59 minutes and then shuts on standby.maybe i doing something wrong?!pleas help me to switch off this limited time!