I have this code:

def backSDE(ActiveSDE):
    arcpy.env.overwriteOutput = True
    arcpy.env.workspace = ActiveSDE
    fcs = arcpy.ListFeatureClasses()
    print fcs

#Databases
ActiveSDE = r"C:\Users\me\AppData\Roaming\ESRI\Desktop10.1\ArcCatalog\SERVER_SQLEXPRESS.gds\Client_Survey"
backSDE(ActiveSDE)

The database only has feature classes inside of it. No datasets. When I run this I get "None" in the python interpreter. There should be 10 feature classes. What am I doing wrong? I'm running ArcMap 10.1