Which pod are you using?
Also, if you are plugging a guitar straight into a line level input, you WILL only get a low, wimpy sounding signal. You need to have something in the chain that will change the impedance of your input (and instrument/line selector?) or a plugin that will boost the input signal enough.
And then there is the monitoring side of using Pods... Are you listening to the outut monitoring of your Pod or the audio outs on your computer? Whichever you are using, try the other one.