Installing pfsense2 on WatchGuard x1250e. Appear not recognize my 4 GB CF

[sevilla]

Hi..

Some months ago, i installed PFsense 1.2.3 on my WatchGuard X1250 using 512MB CF. All works well.

Now, i want try Pfsense2 using 4GB CF. I dont get any output from console port. I tried to load Pfsense 1.2.3 over the same
4 GB CF and no output form console.

Anyone have any idea? maybe my Hardware dont recognize 4 GB CF..