How do I store channels on that analogue receiver?

[frikoriko]

I just got one of these receivers and it didn't come with any manual. If you have one or the manual, could you tell me how to store the channels? Pressing the STORE button displays an S for a few seconds but doesn't store the channel settings.
I'm attaching a picture of the remote.

It's a Welltech W999 Stereo Receiver

 

[gameboy]

This is a receiver sold by Lidl in 2001 maybe someone will still have the manual.

Welltech is the Lidl electronic make (though I don't see it used now).

Hopefully some one here will have bought one and help.

 

[Topper]

Pressing the STORE button displays an S for a few seconds but doesn't store the channel settings.

Logic dictates that if you are telling it to store a channel surely you have to tell it what number to store it against by pressing store 21 for example or am I being too simplistic?

 

[frikoriko]

I tried that, when I press a Number after STORE, it just goes to that channel Number and doesn't store the settings.
Even tried pressing STORE and the Channel Number simultaneously, no luck