I have this problem with my Ainol 7 Paladin (0130) and Huawei internet key.
I downloaded the MobileManager from your link (thank you!) but there's something that goes wrong:
I get the message Unknown Mobile Network Service Provider at bottom right. I click on it, and neither the 3G check box and Data delivery (where I'm supposing I should put my APN etc.) are highlighted. But the Hardware info and (even before) the Modem support list now are highlighted and clickable....
What am I missing, in your opinion?
Then, my usb internet key comes also with an sdcard into it: if I have 3G Mobile Manager installed, no way to see the sdcard as an usb storage in the Ainol; if I uninstall 3G Mobile manager, then the Ainol detects the sdcard but... I'm not able to see the files on it!!!