Hi twol
Thank you for your input. I was sure the encryption setting was correct for the router as i have used it on this box for some time.
After checking many of the settings l decided to flash the box to an older image copy and that resolved the problem
I noticed when moving to the config, Network, Device the Wlan connection was 8192CU where it had previosly displayed RTL8192CU
Not fully understand why but now fixed under release 6.2.009. I would also add that when i then upgraded to release 6.2.0010 l encountered the problem once again. I have downgraded to release 6.2.009 as it works for me and I will wait for the future release 6.2.011
Thanks for your input