Any rose gardeners out there?

My roses look like crap this year. The shrub rose has some fungal disease. I've been spraying it since I noticed (in fact, that is one of the things on my list for tomorrow) but it doesn't seem to be doing any good. The "Amazing Grace" rose has something wrong with the blooms - they are all brown around the edges and inside the flowers is all nasty and brown. I am most definitely not channeling my grandmother this year. Her roses were awesome and I really wish I had taken an interest in gardening when she was alive. I inherited her gardening books but I wish I had her to ask. Anyone care to offer some advice?r