Digital BW, The Print

Just tonight I started having problems feeding thicker papers through
my R220 - the William Turner or Photo Rag for example (those may not
be that thick but they are giving me problems).  It seems that they
will only feed through if I "curl" the leading edge, not much, just a
bit - as if the paper came off a roll.  Occassionally they will begin
to load and then feed all the way through without printing.  The
printer then reports an error loading the paper.  Other times, with
Museum Etching for example, the paper would not feed at all.  

Prior to tonight I had no problems with Willam Turner or PR.  Tonight
was the first time I tried Museum Etching.  

Any ideas as to what I can do to fix it?  

Thanks, Brian