Problematical flash transmitter for Elinchrom studio lights?

[Mrs Yelvertoft]

Need some help here...
I have Duncan's studio lights, Elinchrom D-Lite4's, which I really want to get more use out of. They came with a radio transmitter which goes on the camera's hot shoe and receiver (AT-16) which attaches to one of the light units, but I'm finding that in approx 1 in every 6 shots it does not trigger the light units. I thought it was the adaptor which fits onto the receiving end and seemed a bit loose so have replaced this with a 3.5mm mono to 1/4" mono adaptor but again still have an intermittent problem with the lights not firing. I have borrowed a Interfit IR flash transmitter from a friend and this seems OK but I really don't want to spend money on a IR transmitter if I can get the original one working more consistently.
Any ideas of what I might be doing wrong?
Debbi

[miketoll]

What is the connection like between the camera hot shoe and the transmitter? Try cleaning the contacts on the transmitter just to make sure.

[Mrs Yelvertoft]

The connection seems fine between the hotshoe and the transmitter, I've cleaned both just to be sure but still getting the problem.
Anyone else able to help?
Debbi

[Gidders]

Might be worth trying a new battery in the transmitter?

[Mrs Yelvertoft]

Oh such a simple solution! Battery changed and all works ok - I do feel stupid, but I must admit that the screw to open the transmitter unit was covered up by the quality control sticker, so I didn't even know there was a battery in there.
Thanks both for your help
Debbi