Hello,\n\nI'm preparing for 70-315 and I use the self-paced training kit (developing\nweb applications). I'm having difficulties with the lab of chapter 5. I don't\nknow if this is the proper newsgroup to post this problem, but I'll get to\nknow if it isn't.\nThe datasets of the Contact Management-application are on Switchboard.aspx.\nThey are saved in the cache, so that other pages can use the same datasets.\nIn the Page_load of AddContact.aspx, the datasets are read from the cache\nand bound to controls. On AddContact.aspx is also a DropDownList\n(drpContactTypes) where a contacttype should be chosen. This DropDownList\nstays empty, no matter what I try. I followed everything from the book, so it\nshould work.\nDoes anyone had this problem before?