My torch handle connections loose?

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Hi,
Just connected my Cut50 and couldn't get it to start air or cutting unless I lifted the cord just as it enters the base of the torch. Tightened the ground, the ground cord, the connections at the machine, replaced the tip and the electrode, tightened the insulator, still the same issue. If somebody has had this issue, how do you tighten the connections? Is that the right response to the problem? Bruce? Mark? Many thanks.
Jerry