Have you tried accessing your DPR-1260 home page - your IP address may vary - and choosing the SCAN option?
My DPR will scan from my printer AND will open Adobe Acrobat Pro on my Windows 7 laptop! Its actually more reliable than adobe function.
Of course, windows 7 map network will find it, but cannot place it on the map. If I choose the wifi network on network and sharing center, it will show the DPR as a printer! Double click on it, and it opens its home page.
However, the printer (attached to the DPR) shown in printers and devices cannot find the DPR -- augghhh.