ubuntu 8.1 can't open update manager Malformed line 49 in source list

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Update your source list from the source list option in system administration

I can't use update manager or synaptic package manager

No, the source list
System, administration, software sources.
make sure you are connected to the internet.
This is what you need to do to connect to the software sources on the internet to update and install software.
If you do not have an internet connection, you will have to connect to the cd/dvd yo instlled from.
however you do it, this is where in the system you tell your computer where to go

My source list make automatic update every day. I try to remake it and after a reboot the problem still there.

go into your source list and tell me what you see

I have the same problem....Update Manager will not open. I get a red target icon that reports that there is a malformed line 54 in source list /etc/apt/source.list. When I view this file it looks normal. Can I delete the "source.list" file and perhaps Update Manager will recreate it?

Thanks for any help.

Jesse Underwood