[TYPO3] Cal and Wrong Time (Time Offset Problem)

[Fabio ex Typo3 n00b]

I have installed the extension Cal, my typo3 installation is configured 
to GTM+1

But when I configure Cal with
plugin.tx_cal_controller.day_start = 0600
plugin.tx_cal_controller.day_end = 2300

It show the calendar from 06:00 to 22:00

and when I create an Event

Start: 14:00 (2PM)
End: 16:00 (4PM)

Its showed in the cells 15:00 (3PM) - 16:00 (4PM)

How to solve this?

I tried
plugin.tx_cal_controller.timezone = GMT+1
Tried 1, +1 too

Thanks all