No, it shouldn't happen. Is your LW connected to the network (how many green connection bars do you see)? If you don't have a connection, read through this thread for info & tips.
Connection problems? Check here first!

If the connection's ok, check out the thread here, try the advice given (including deleting LW's preferences folder).
Blank results page

If you're stuck, tell us your details.
System details - help us to help you