Saving changed members using RSE doesn't work

Hello everybody!

I am expiriencing some problems using the RSE. While browsing existing members
and creating new members works fine, it is not possible to save a changed member
using the LPEX editor. If I do so, the changes do not affect the iSeries, but
only a temporary directory on the PC. When I open the file again using RSE, the
change is visible. But PDM shows me that the member has not changed on the
iSeries. 

According to the documentation I have read, the change should be made
immediately on the iSeries.

Does anybody know why the changed file is not saved? I do not see any possiblity
of issueing a commit-command or something like this... Is it possible that I
need to install some (more) PTFs? Is there an option to make the changes on the
iSeries immediatly?

Regards
Andreas Wagner