Description of problem:
I tried register system to rhn satellite by rhn_register in GUI. I filled bad value in field "Location" (window "Choose Service"). I got error message. I repaired this value and tried it again. But I couldn't continue with registration and got same error.

Version-Release number of selected component (if applicable):
rhn-client-tools-1.0.0-93.el6.noarch

How reproducible:
always

Steps to Reproduce:
1. run GUI rhn_register
2. set incorrect value in field "Location" in window "Choose Service" and confirm
3. get error message and try to continue
4. set correct value (exist url of satellite) to this field and confirm
  
Actual results:
Value is correct, but I can't continue with registration and I get this error in /var/log/up2date:

>> tail /var/log/up2date
rhn_register A socket error occurred: [Errno -2] Name or service not known, attempt #1
[Wed Dec 12 09:43:55 2012] rhn_register 
Traceback (most recent call last):
  File "/usr/share/rhn/up2date_client/rhnregGui.py", line 350, in _chooseServerPageApply
    rhnreg.getCaps()
  File "/usr/share/rhn/up2date_client/rhnreg.py", line 249, in getCaps
    s.capabilities.validate()
  File "/usr/share/rhn/up2date_client/rhnserver.py", line 160, in __get_capabilities
    self.registration.welcome_message()
  File "/usr/share/rhn/up2date_client/rhnserver.py", line 51, in __call__
    return rpcServer.doCall(method, *args, **kwargs)
  File "/usr/share/rhn/up2date_client/rpcServer.py", line 215, in doCall
    raise up2dateErrors.CommunicationError(e.args[1])
<class 'up2date_client.up2dateErrors.CommunicationError'>: Error communicating with server. The message was:
Name or service not known

Expected results:
If I set correct value I can continue with registration.