RF links using virtualWire.h not working

firashelou:
hello guys,
i am making a simple wireless communication using RF links and virtual wire, but seems not it's not working
these are the RF links that i am using (433 Mhz) :

antenna dimension is 25cm (copper wire like half a millimeter)

Receiver:
antenna dimension is 32cm (copper wire like half a millimeter)

Those antenna wires should be half-dipoles, in other words each 17cm long.