Windows 2003 Throughput issues

I have a windows 2003 standard server installed at Co-location company.
I have a full 10Mbps ethernet link to the Internet. I have this server for
IIS web and ftp hosting solutions. I also have a Redhat 9.0 box in the same
cabinet and use this server for DNS only. There is also a Cisco 1900 Cat
switch
in the cabinet. Both servers are conntected to ports 1 and 2 on the switch.
Both ports are "Hard Set" to 10Mbps Full Duplex. Bother NICs on both
servers are also "Hard Set" to 10Mbps Full Duplex. I have cleared the
counters for both ports on the switch. I am not seeing any erros at all.
The problem that I am seeing is I should be seeing a download rate at
about 920KB/sec to 980KB/sec download speed as I have a Full 10Mpbs link to
the Internet. I am only
seeing about 310KB/sec. There are no Traffic shaping access lists applied
anywhere, I have checked this out with the hosting company. When I transfer
files between the Linux box and the Win2K3 box, I get about 8.99Mbps upload
and download throughput. Layer 1 and Layer 2 is working just fine. The Linux
box I can download
a file from the Internet about about 1010KB/sec:
Ouput from Redhat:

2% [> ] 18,748,808 1020.76K/s ETA
10:01

It would take me about 10 minutes to download a 667Meg ISO file from the
Linux
box.
It would take me about 34 minutes from the Win2K3 box at about 306KB/sec

It appears I am not getting sustained 8-9Mbps as I should be getting from
the Internet
as my Linux box was getting. The Win2K3 Box has AD installed as a
requirement
for Exchange 2003. I have IIS 6.0 installed also. I am not sure where the
problem is. I can also download 4 (650Meg) files at the same time and have
a sustained download rate at 280KB/sec on all 4 files for a total of 8.3Mbps
of throughput which is what I should be getting. It appears that there is
some QOS
or bandwidth limiting going on but I am not sure. Does anyone have any ideas
as
I am at point with no more ideas.


Thank You
Billy