The European version and the US version use different frequencies, and thus are totally incompatible.
The radio trigger module inside the L-358 must match the PocketWizard version that you're using.
To check the meter, open the battery cover and check the label on the little gray plastic block to the right of the battery.
If there is one and the label has an FCC logo, then it's the US version. If it does not have the FCC logo, then it's the European version.
If there's a hole, then you have no radio trigger installed. It was an option, sold separately.