Crystal apple

Hi can someone help me please, i grew a crystal apple cucumber for the second year last year and it never grew any fruit. I had it in a greenhouse(glass), the first time i grew it successfully it was in a sml plastic one. Cant remember last year if i had to remove male flowers, so this year i bought seeds and a plant and the packet says not too, but alas both are still only growing male flowers the others are just sitting there doing nothing. Dont know what im doing wrong. got one in a glass greenhouse and one in the same plastic style one
Thank you
Diane 

All the squash/pumpkin/cucumber/courgette family do this sometimes, at the start of the season.

Feed and water and they should soon sort themselves out 

Thank you. I will leave and see how it goes. 😊