Thanks for writing. If it was just a couple of weeks ago that you planted your roses, the timing is probably the problem. By this point in the season, the plants have likely used up a good amount of their reserves.
Also: Be sure to keep them moist. In my area (Iowa), we've had a remarkably cool, moist summer --- so a lot of newly planted things never got well rooted. Now that it's starting to get dry, they're suffering because they never had to send their roots deep into the ground in search of water.
---Justin, Senior Garden Editor, BHG.com "