After I found
fb2png recompile for A1200/E6 by epinter. so this is what it need to I update my old capture application loopcap from use mcap to fb2png. so new version produce a png image of screen instead of bmp.
here is it LoopCap 1.2 (fb2png) and 1.0 (mcap)
LoopCap for capture screen of A1200 and Rokr E6.
Installed by Mpkg Installer.
How to use it
1. tap on LoopCap icon.
2. tap on Capture button.
3. change to screen that want to capture in 5 sec.
4. LoopCap will save screen into cap folder in MMC.
5. and LoopCap will waiting for command until you exit it.
Because it named LoopCap so It always ask you for capture until you tap on exit button.