Macbook cannot connect to shared printer
I have an iMac to which my HP laser printer is connected via USB. I want to be able to print documents from my Macbook to the printer, but although it recognises the printer on the network, every time I try to connect to it it says "Unable to download the software from the server at the time".
The printer is switched on, has paper, toner etc. The iMac is switched on. Both computers can talk to each other. Printer sharing is turned on. I have downloaded the Apple software update for HP printers. I'm a bit at a loss as to what to try next!
Please help cos I've been trying to get this sorted for a week now!
Thanks
MacBook Pro