Trains run regularly from Manchester Victoria to Ashton Station, journey takes about 10 mins. Would be a bit of a walk from there though as CA is a bit out.
If you check this map you can see CA (red circle) and the station...
http://www.multimap.com/map/browse.cgi?client= public&X=392500&Y=399500&width=700&height=400& gride=392732&gridn=399714&srec=0&coordsys=gb&d b=pc&addr1=&addr2=&addr3=&pc=OL79HG&advanced=& local=&localinfosel=&kw=&inmap=&table=&ovtype= &keepicon=true&zm=0&scale=10000&right.x=6&righ t.y=143
You can get train times here...
http://www.qjump.co.uk/
Just make sure you put Manchester Victoria in as it can come up with some wierd possibilities otherwise.
Otherwise you can get on the 217 bus (Stop D in Picadilly Gardens - by Natwest) and get off at the Lord/Sheldon Way/Leisure Park stop (where Rayner Lane is on the above map) then a 10 min walk.
Should take about half an hour as the buses take ages to get up that way compared to the train.
Hope this helps.