setting break points with windbg

I have a serial connection with the target machine and am using windbg
6.2.0007.4.

I have a source file open and am tring to set a break point and I get a
message back “symbol information for the current line could not be located
in the currently loaded symbols…”

The symbol path is correct and am able to set a break point with this
method occasionally. (I have rebooted both systems several times and in
differnt orders)

It seems that once I reboot the target, I have difficulty getting this
feature to work again.

What is the correct method of repeatedly (after a reboot) setting a break
point from source level window?

Thanks,

Clay

Sorry - wrong forum.