Very Low Throughput to VM's Behind ASG v8

I have 3 Windows 2K8 VM's sitting on my 'cloud' service providers VMware based infrastructure. Two of the machines are sitting behind an Astaro ASG v8 and one is sitting on it's own out from behind the Astaro VM.

The machine not behind the Astaro is realizing download speeds of 20+ Mbps up and down and the two machines behind it are seeing speeds of .45Mbps down and up to 6 Mbps up.

Here are the particulars:

Astaro ASG v8
Firmware: 8.305
Pattern: 25366
MTU size 1500 (compatible with what service provider is using)
Virtual Net Cards in ASG: [Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]]
Auto Negotiation : ON
MI Capable: No
HA link monitoring: Yes
External (WAN) eth1: ***.***.***.2
Additional IP's on External: ***.***.***.3 & ***.***.***.4 NAT'ed to internal IP's behind ASG below:
Internal: aaa.aaa.aaa.3 and aaa.aaa.aaa.4 (experiencing the problem)

Virtual netowrk cards in W2K8 VM's: Intel Pro/100 MT Network Connection

Attached Images

ASGBandwidthProblem.jpg (17.5 KB)