I have been putting a lot of effort into my game for some time and am really happy with my performance on the range. Long drives, good wedge to 7 iron, and taking lessons on 5 iron down to 3. Today I played in club competition and everything went west! Cant replicate my range practice even though I use the same routine setup etc. I went back to the range to try and sort things out but even there there was no strike rhythm or timing with all clubs. Is this a common problem or can anyone enlighten me further?

Help needed!
Robert