Java APIs

I'm trying to pass a value to an ASPX page from a java application. This is the code I'm using the pass the value:

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// Construct data
String data = URLEncoder.encode("key1", "UTF-8") + "=" + URLEncoder.encode("hlaldfjl", "UTF-8");

// Send data
URL url = new URL("http:// ........ /test.aspx");
URLConnection conn = url.openConnection();
conn.setDoOutput(true);

OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(data);
wr.flush();
// Get the response

BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
StringBuffer answer = new StringBuffer();
String line;

while ((line = rd.readLine()) != null) {
// Process line...
answer.append(line);
}
wr.close();
rd.close();
System.out.println(answer.toString());

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The ASPX page has the following:

fnameID=Request.QueryString("key1")
Response.Write("variable passed was " & fnameID)

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When I run the Java code, I get:
variable passed was
BUILD SUCCESSFUL (total time: 1 second)

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I guess that the connection to the URL is ok, but the variable "key1" is not being passed.

Any ideas? Any other easier ways to pass a variable through a POST method? I have done it before with ActionScript and it was really easy since they have a URLRequest and URLvariables methods; with Java I'm at lost...

Thanks in advance,