Samba Share on Zyxel Surf&phone release

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Hello together!
I have CO2 UFO von Zyxel P-2602HWN-D7A and simple CO2 a DSL Surf&phone connection.
After as I determined, these rout the last muck is, one however nothing else (without costs and expenditure) to use can are unfortunately on it dependent I nunal.
My problem is the following.
My MacBook seizes via WLAN on Internet too via the CO2 routs.
Likewise at the CO2 rout announced is as a Wireless client a Asus W520GU with geflashter Toma ton firmware. On it a USB non removable disk hangs via ftp and SMB is released.
And now it happens as follows: That access to the plate via ftp from the Mac functions marvelously. Even if the Asus as ACCESS POINT is used folds the SMB access to the OPlatte.
Right-moderately is thus on Asus sides everything correct.

After eternal telephone calls and discussions with CO2 it was called one haven to separately de-energise there must. (First it was called that that at all inicht functioned over by the way routs a Samba Share to access)
Said done: Haven 137, 138, 139 and 445 TCP/UDP as NAT furnished and into the Firewall as rule the certified will is furnished, the IP reserves also here the nothing shifts on the part of Asus.
But: That access does not fold from the Mac simply.

Here still does somebody have an idea that it lies? which one could have surveyed? If necessary I can do aucch times mail of CO2 the posts those the vermeindliche guidance contain.

Thank you for your assistance,
Markus, with rout desperately