Does the PC or Switch come up at 100M ?
What duplex setting can you achive.
Im pretty sure the PA-FE can only do 100m full so try to cross over connect it to the PC and see what the PC negotiates to.
Don't forget rule number one; "never use auto sense or auto negotiate!".
Rule number two might help "avoid exsesive links in the network such as media converters" Keep It Simple
Verify if you can achive the speed and duplex from the media converter to begin with. it might not do 100meg and the router might not be able to do 10meg