as PCASC has just said in an email to their list:

The Senate Finance Committee takes up CAFTA on Tues. June 14th!! This
is part of a process called a mock mark-up, which allows Senators to
state their positions and frame the debate, without actually starting
the CAFTA fast-track time clock ticking...

So, if a senator from your state is on the Finance Committee, call him up and tell him to vote against CAFTA. This is the time.