Cant update BiddingScheme with UpdateCampaignsRequest, returns no errors.

Question

Hi,

Im trying to update BiddingScheme to MaxClicksBiddingScheme, it returns no errors but the campaign is not updated.

 <s:Envelope xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
                <s:Header xmlns="https://bingads.microsoft.com/CampaignManagement/v13">
                    <Action mustUnderstand="1">UpdateCampaigns</Action>
                    <AuthenticationToken i:nil="false">${token}</AuthenticationToken>
                    <CustomerAccountId i:nil="false">${AccountId}</CustomerAccountId>
                    <CustomerId i:nil="false">${CustomerId}</CustomerId>
                    <DeveloperToken i:nil="false">${DeveloperToken}</DeveloperToken>
                </s:Header>
                <s:Body>
                    <UpdateCampaignsRequest xmlns="https://bingads.microsoft.com/CampaignManagement/v13">
                        <AccountId i:nil="false">${AccountId}</AccountId>
                        <Campaigns i:nil="false">   
                            <Campaign i:nil="false">
                                <BiddingScheme i:nil="false" i:type="MaxClicksBiddingScheme">
                                    <Type i:nil="false">MaxClicks</Type>
                                </BiddingScheme>
                                <Id i:nil="false">${campaignId}</Id>
                            </Campaign>
                        </Campaigns>
                    </UpdateCampaignsRequest>
                </s:Body>
            </s:Envelope>