Nokia :: E51 - Configure Mail For Exchange - System Error

I have Nokia e51 and I've tried to configure MfE on it the same way it works on my other Nokia phone (5230), but although the settings are exactly the same, I keep on receiving "System Error" while synchronizing the email (it looks like this translated from Polish I click 'synchronize' it says 'connected' 'synchronizing email' 'sync failed. Contact your administrator if the problem persists'). The email account is Gmail. My settings:

Connection:
Exchange server: m.google.com
Secure connection: Yes
Access point: (no matter if I set WiFi or WAP or Internet - it doesn't change anything)
Default port: Yes
Credentials:
Username: [my username]@gmail.com
Password: [my password]
Domain: [empty]
Sync schedule: Always On
Calendar, Tasks, Contacts: [all disabled]
E-mail:
Synchronize Email: Enable
E-mail address: [my username]@gmail.com (the same as above)
Show new mail popup: Yes
Use signature: No
Signature: [empty]
When sending mail: send immediately
Sync messages back: 1 day

Everything is as the setup instructions for MfE at Google Support says and , as I said, it works perfectly on Nokia 5230. The log says: "System error, try again later"

The funy part is that I've tried using two different e-mail accounts: they both display that error but the one that works on my other Nokia apparently downloaded the mail (although it still shows errors everywhere, even the log says it didn't work). The MfE is the most current, I've downloaded it from Ovi store today (3.00.050), my Nokia software is updated too (410.34.001).