if i was you i would send it back as soon as possible whilst its still in its return period. these boxes are notoriously unreliable and sound like a jumbo jet as well. there are only three on the market worth buying, but depends on your budget.
this is my choice in order preference-
echostar hds-600rs- this is what i have, it is fantastic but does have some recording problems that should be sorted in the next few days in the latest software release, but costs £299, but does have a slingbox built in. it is the best box in terms of ease of use and picture quality.
panasonic dmr-xs380- i had one of these, it was great i only returned it due to it vibrating as it was faulty, i was going to buy another one but in the end i decided the echostar was better. at the moment it is only £249 from play.com which is a cracking price as lots of places want £400 for it, it is also a dvd player/recorder.
humax foxsat hdr- i had one of these but didn't like the picture on it so i returned it, i couldn't get it back to the shop quick enough to tell the truth. but there are thousands of very happy users out there that love them so it must be pretty good, maybe it just didn't suit me. i thinks it costs about £230 new.
do some research to see what suits you best, there is loads of info on these here forums and at amazon and avforums.com.
if you cant afford either of the above boxes i would wait until you can as no other boxes are worth buying, but you could try the second hand market, there are always plenty of humax's on ebay.