Java Programming

hi I am using the following code to construct a string and i see that it seems that the correct string is made but the application does not run
if i just cut n paste the same string into command prompt it works fine . please advise :
also note iam costructing string in two way , but using stringbuffer and by using , but both ways dont work.
If the parameter is just one word for example say "Testing" then the shell command works fine which tells me that the string concatanation is not working or embedding some special chars?

...
public static void main(String args[]) {
String s = null;
// system command to run
String quotes="\"";
String parameter = quotes args[0] quotes;
String cmd = "awtrap -f 10.200.16.17 -h 10.100.10.112 -p 162 -c fdot 1.3.6.1.4.1.791.2.9.2 6 4 1.3.6.1.4.1.791.2.9.2 -s " parameter;
System.out.println(cmd);
File workDir = new File("/opt/CA/SharedComponents/ccs/atech/services/bin");
StringBuffer sb = new StringBuffer();
sb.append("awtrap -f 10.200.16.17 -h 10.100.10.112 -p 162 -c fdot 1.3.6.1.4.1.791.2.9.2 6 4 1.3.6.1.4.1.791.2.9.2 -s ");
sb.append("\"");
sb.append(args[0]);
sb.append("\"");
String str2 = sb.toString();
System.out.println(str2);
try {
Process p = Runtime.getRuntime().exec(cmd, null, workDir);
....

========================================== below is the run log ============================================

awtrap -f 10.200.16.17 -h 10.100.10.112 -p 162 -c fdot 1.3.6.1.4.1.791.2.9.2 6 4 1.3.6.1.4.1.791.2.9.2 -s "testing 2"
awtrap -f 10.200.16.17 -h 10.100.10.112 -p 162 -c fdot 1.3.6.1.4.1.791.2.9.2 6 4 1.3.6.1.4.1.791.2.9.2 -s "testing 2"
usage: /opt/CA/SharedComponents/ccs/atech/services/bin/awtrap [-v 1 | 2c | 3] [-i] [-r retries] [-f from_addr | from_host]
[-h dest_addr | dest_host] [-p port] [-t timeout ] [-d logLevel]
[-c community] enterprise type [subtype] [oid oidtype value]


================================= now if I just cut n paste the string on command prompt it runs fine =====================

Pt$ awtrap -f 10.200.16.17 -h 10.100.10.112 -p 162 -c fdot 1.3.6.1.4.1.791.2.9.2 6 4 1.3.6.1.4.1.791.2.9.2 -s "testing 2"
Pt$