VM can't get access to network over the proxmox bridge.

Hi, sorry for my bad english, but i have a problem.
My VM cant use network to get access to internet, but in the area of the proxmox netbridge all working fine.
VM parameters:
1)Templates: Linux Debian 6.0.6 standart
2)№ of cores: 1 virtual (proxmox's node has 2 virtual, because im using virtualbox for testing, I mean I run virtual machine in virtual machine)
3)512 mb ram, 512 mb of swap.
4)2 gb hard drive.
VirtualBox settings:
1)OS: Debian
2)2 gb of RAM
3)core risk lvl 80%
4)VBoosting: VT-x/AMD-V, Nested Paging, PAE/NX
5)Network adapter: Intel PRO/1000 MT Desktop (Network bridge, 'Atheros AR948WB-EG Wireless Network Adapter')

Cool thing:
When I using my PCI-E network adapter, VM cant get ip adress form dhcp server on my router, but when im using a wireless adapter, all working great (i mean only ip receiving).

Can you help me to configure my network. Im only 17, so all information is useful)