Can anyone help please

I have a Metz 15 MS - 1 ring flash which I bought to use on my Sony A77 11, since then I have bought the Sony A711 and find the connector is not compatible with the new camera, I can't find a cable through the uk suppliers for Metz but they suggested using a hotshot adaptor I have tried that but it won't work, as this is not a cheap ring flash I would like to use it but if I can't get it to work will have to let it go which will be a shame as it is so good 
Anyone any ideas please?
Regards Charlotte

Anyone any ideas please?
Regards Charlotte

Thank you David
I have been in touch with Metz and the guy there has put me right, I actually had what I needed to use it and its working like a dream.
For anyone who has experienced the same problem you need a Pixel TF-324 hot shoe convertor or similar, having that on your hotshot put the lead on that and the flash, to set the flash up hold the select button on the left down until it reads see in the window, now scroll through the menus until you find Sync hit okay and you have it use the outer buttons to adjust your power output
I hope this helps anyone who has the same problem
Charlotte
I have been in touch with Metz and the guy there has put me right, I actually had what I needed to use it and its working like a dream.
For anyone who has experienced the same problem you need a Pixel TF-324 hot shoe convertor or similar, having that on your hotshot put the lead on that and the flash, to set the flash up hold the select button on the left down until it reads see in the window, now scroll through the menus until you find Sync hit okay and you have it use the outer buttons to adjust your power output

I hope this helps anyone who has the same problem

Charlotte