Traceback (innermost last):
  File "/usr/bin/anaconda", line 438, in ?
    intf.run(todo, test = test)
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/text.py", line 1030, in 
run
    rc = apply (step[1](), step[2])
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/text.py", line 507, in 
__call__
    if todo.doInstall ():
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/todo.py", line 1470, in 
doInstall
    self.fstab.turnOnSwap()
  File "fstab.py", line 408, in turnOnSwap
    isys.swapon (file)
  File "isys.py", line 142, in swapon
    return _isys.swapon (path)
SystemError: (22, 'Invalid argument')

Local variables in innermost frame:
path: /tmp/swap/hdb1

ToDo object:
(itodo
ToDo
p1
(dp2
S'method'
p3
(iimage
CdromInstallMethod
p4
(dp5
S'progressWindow'
p6

<failed>

i got that error when trying to install Red Hat linux 7.0 and i cant get 
past it. Please help.