If they are new plants from runners they will not be strong enough to produce fruit. Cut off any runners and feed your plants for next year. Are they earlies, mid season or lates, if lates there is still time to produce some fruit.

hi doctor bob, so does that mean i must remove all of the runners to allow fruit to develop.
we have been away for 2 weeks & the slugs ate the iceberg lettuce,all the goosberries have dissapeared, & no fruit on the strawberries,
thanks for your prompt reply..len

Yes remove all the runners to make one large plant, if you have any gaps leave one or two runners to make plants to fill them. Watch out for ants they will kill off some of your plants. Sorry you have lost some of your crops, it's very difficult, I lost some strawberries to a huge rabbit.