This should work.
Can you edit your post and include the following information (your outputs may be different):
In[1]:= Needs["PacletManager`"]
In[2]:= PacletFind["*Social*"]
Out[2]= {
PacletManager`Paclet[
"Name" -> "SocialMediaData", "Version" -> "9.0.1.2",
"MathematicaVersion" -> "9+", "BackwardCompatible" -> "*",
"Extensions" -> {{
"Resource", "Root" -> "Data",
"Resources" -> {"SocialMediaData.wdx"}}},
"Location" -> "C:\\Users\\arnoudb.WRI\\AppData\\Roaming\\\
Mathematica\\Paclets\\Repository\\SocialMediaData-9.0.1.2"]}
In[3]:= SystemInformation["Small"]
Out[3]= {"Kernel" -> {"SystemID" -> "Windows-x86-64",
"ReleaseID" -> "9.0.1.0 (4055652, 4055188)",
"CreationDate" -> {2013, 1, 25, 0, 3, 27}},
"FrontEnd" -> {"OperatingSystem" -> "Windows",
"ReleaseID" -> "9.0.1.0 (4055652, 4055634)",
"CreationDate" -> {2013, 1, 25, 11, 32, 33}}}