Hello and good evening,
While this community is specifically for small business products, a few things to check are:
IP addresses of the printers
VLAN assaignment of the ports, and your VLAN access / routing configs
Duplex and speed settings (you mention these are already good)
If you have connected one switch to another, and you are using multiple VLANs besides vlan 1, make sure you have the trunk links configured correctly between the two switches.
As mentioned, this community is for Cisco Small Business products and your question is in reference to a Cisco Elite/traditional product. You would likely have a better experience by posting your question in the Cisco NetPro forums located here: http://forums.cisco.com/eforum/servlet/NetProf?page=main
This forum has subject matter experts on Cisco Elite/traditional products that may be able to answer your question.
HTH,
Andrew Lissitz