Port settings in Wuala cannot be changed?

I installed Wuala just today and I run it on my server with an uptime of approximately 95% and 15gb of absolutely unused storage readily available at 40-60kbyte/s.
Now the problem is that my server is only connected to the port 65001-65535. If I, however, try to change this setting, I get the following error message: "All other options could be saved correctly"
Does that mean, that for now I cannot share any space with Wuala because 7492 isn't forwarded to my server? Or is there a workaround?

Thanks in advance,
Darkstriker