I am having such a difficult time in making roses...any ideas please...

What are you trying to make the roses out of? Buttercream, Royal Icing, Gumpaste or Fondant?

I bet your making buttercram roses? Make a base for your rose on the nail. Then make the inner circle. Three petals around that and then four....Boy that is really hard to explain without being able to show you!

bump

If they are buttercream or royal icing, here's a tip -
take your rose nail, turn it upside down with the point up - and stick a gumdrop on it! This provides a stable base for your rose! Continue to make your rose like you normally would. Use your scissors to grab ahold of the gumdrop, and place the rose on your cake.
I've told my students, as long as they look like cabbages, you are off to a good start! They, too, take time and practice.
Relax and be patient, it will become second nature.

Go to www.wilton com their is a section where they show a clip on how to make roses, I think you type in "Roses" in the search box

There are also a TON of videos on youtube.com that show various techniques. It took me forever to get the hang of it, but mine just keep getting better and better and I'm relieved.