Newbe200,
Not having a go at you but how long is it since your AC has been in Radar and had a positive check of your transponder?
Try swapping positions, with you being the big fat target trying to find the small target.
It is very helpful when the smaller Ac provides info as to relative range/bearing to assist the eyes.
It is NOT very helpful to hear "have you visual...well clear"
It is amazing the amount of times there is TCAS traffic (in CTA mind you
) within 5 miles that you just cannot see when the viz is still >10k or there is patchy cloud around.
Oh well ..can't see him...must have avoided him