: Missy, you absolutely have to not only turn the water off, but the pipes where you solder must be dry. Any water will prevent the pipes from heating enough for the solder to flow. Sometimes it is a real problem to totally empty the lines, but there are no choices. I don't understand why the water continues to flow if you have turned it off, and that may be the first problem you need to solve.
MIssy; After you turn off the MAIN Valve, make sure you OPEN all taps etc, this will empty tour lines so you can repair them. Hube