Bootproblem with backtrack 5R1 full disk encryption usb

hello everyone,
ive just installed bt5 like the turtorial explains, the following problem occurs.

while booting after entering the crypt passphrase and some working messages the following unnormal messages appear:
init: ureadahead main process (471) terminated with status 5
fsck from util-linux-ng 2.17.2
/dev/mapper/vg-root/ clean, 38615/610800 files, 1922458/2440192 blocks
The disk drive for /boot ist not ready yet or not present
Continue to wait; or Press S to skip mounting or M for manual recovery

If i press S backtrack boots like normal? and everything seems to work appart of the fact that everything seems to be to slow. Any ideas?

greets