Welcome to the wonderful world of machine embroidery (ME) and AnnTheGran (ATG)!
We have all been newbies at one time or another, so it is not usuaual that you have a little issue with this design. The most likely reason that your design failed was lack of proper stabilizing. Do see my Stablizer Blog for more tips and information.
Always do a 'test sew' of your project on the same type of fabric with the same design and threads. That will tell you what needs to be corrected such as more stabilizing or a less dense design, etc.

Read the Blogs and Forums for answers and ask as many questions as you like. ATG has the friendliest and most knowledgeable ME enthusiasts in the world! Post a photo of your project, here is how: in a reply or new thread, select the Media Icon (film strip) and follow the prompts.
Pat, The Avid Embroiderer
If you are interested in selling your projects, you can determine your costs and profits quickly with my Spreadsheet.
If you want a lot of great information on working easier, faster and more confidently on your computer, check out my Tips and Tricks.
If you want to see my pashminas (that I successfully sell retail) check them out here. I also wholesale them.