RestKit PUT not working - objective-c

Question

I'm trying to do a fairly basic HTTP PUT using RestKit. I don't want to put the entire object, since the API call was designed to accept a single query parameter and just update that field. I've tried two approaches so far, both unsuccessful.
URL to post to: https://myserver/api/users/{userId}
Query string parameter: verificationCode=
Example usage: PUT https://myserver/api/users/101?verificationCode=646133
Approach #1: Put the query parameter in a RKParams object and make the PUT call with those params.
NSString *putUrl = [NSString stringWithFormat:#"/api/users/%i", [APIUserInfo sharedAPIUserInfo].apiUserIdx];
NSLog(#"the PUT url is %#", putUrl);
// Send a PUT to a remote resource. The dictionary will be transparently
// converted into a URL encoded representation and sent along as the request body
NSDictionary* paramsDict = [NSDictionary dictionaryWithObject:[_verificationCode text] forKey:#"verificationCode"];
// Convert the NS Dictionary into Params
RKParams *params = [RKParams paramsWithDictionary:paramsDict];
[[RKClient sharedClient] put:putUrl params:params delegate:self];
Approach #2: Build the entire url and try a PUT with params set to nil.
NSString *putUrl = [NSString stringWithFormat:#"/api/users/%i?verificationCode=%#", [APIUserInfo sharedAPIUserInfo].apiUserIdx, [_verificationCode text]];
NSLog(#"the PUT url is %#", putUrl);
[[RKClient sharedClient] put:putUrl params:nil delegate:self];
Neither approach is working for me. The first fails saying "RestKit was asked to retransmit a new body stream for a request. Possible connection error or authentication challenge?" then runs for about 10 seconds and times out. The second approach fails saying HTTP Status 405 - Method Not Allowed.
Can anyone point out where I'm going wrong, or provide me with a simple PUT example using RestKit? Most of the examples I've found at there are putting the entire object which I don't want to do in this case.
UPDATE:
Approach #2 worked well once I got a few things sorted out on the server side. Final solution:
NSString *putUrl = [NSString stringWithFormat:#"/api/users/verify/%i?verificationCode=%#", [APIUserInfo sharedAPIUserInfo].apiUserIdx, [_verificationCode text]];
NSLog(#"the PUT url is %#", putUrl);
[[RKClient sharedClient] put:putUrl params:nil delegate:self];

Answer 1

the HTTP PUT method is disabled on your webserver. It is by default on all webserver for security reasons.
HTTP Status 405 - Method Not Allowed.