Why are your lurs and plugs "snapping off" when you cast ?

[striprman]

Did the bail close ? (make sure you cast with the roller guide on the "bottom" and not the "top" of the reel")
Cracked guide (super glue until it can be replaced)
Burr or rust on guide (use emory cloth until guide can be replaced, if necessary).
Bad knots (learn to tie better knots)
rubbing on spool (don't cast so hard, clean and polish the spool, look for and remove burrs)
Birds nests and line twist (put less line on the reel, don't cast so hard)
Shock leader knot gets caught up in first "gathering" guide (put on a guide with a "baffle" in the supports)
Using too small of a shock leader (don't cast so hard, use heavier higher "pound test" line for a shock leader).