Puppy Peeing in Crate or on Bed during the Day

Question
We have an almost 5 month old Rhodesian Ridgeback who has been peeing in her crate since we first got her, despite what all the text books say about dogs not soiling their den.  She can go all night with no problems (she sleeps on a dog bed in the bedroom) but when she is left in her combo x-pen/crate, she will pee even if only left for two hours (sometimes less), and after having been walked right before being put in.  She will usually pee in the crate (where there is a towel) but sometimes on a dog bed in the pen area, and much less frequently on the concrete flooring.  Last night she peed on her dog bed in the kitchen, and the day before walked into her crate in the kitchen (with towel) and peed.  She doesn't "ask" to go out (no crying, barking, going to door).  We have an 11 year old Rhodesian who was crate/house trained in no time, but this little one has been a challenge.  She's been to the vet often enough, so it's not a UTI.  She had also been having long crying periods when put in the pen/crate, but this has subsided.  In her pen area she has a dog bed, water bowl (which oddly she doesn't use much, waits till she gets out and goes upstairs to drink), kong toy, buster cube, etc.  It's obviously frustrating, and we're running out of ideas.  Many thanks.  

Answer
Make sure she's getting outside often enough. Make sure you catch her peeing outside and reward her HUGELY. Ignore her mistakes. You might also try restricting water a bit until she gets the idea. Try ice cubes. She can lick and eat enough cubes to keep her hydrated while you're gone without filling her bladder. Put her on a schedule of going out. Same time, repeatedly, every time. Be SURE she goes before leaving her confined.
Take her to the same place every single time. JUST to potty, no playing outside right now. Outside is for bathroom and nothing more. Use a key word to encourage her to go and remember REWARDS lots of them!
She might've been raised in a confined area that didn't allow her to get out of her own elminations. This does make training harder. ANd she ust hasn't learned to 'hold' it yet. Like children , all puppies are different. Patience., reward, scheduling and ignoring the bad stuff will get you there :)
Cindi