internal server error 500

i use cf7 & 3rd party integration
i post form results to wsdl
this is the schema

<s:element name=”Accounts_CreateTrialAccount”>
<s:complexType>
<s:sequence>
<s:element minOccurs=”0″ maxOccurs=”1″ name=”username” type=”s:string”/>
<s:element minOccurs=”1″ maxOccurs=”1″ name=”groupid” type=”s:int”/>
<s:element minOccurs=”0″ maxOccurs=”1″ name=”contactPerson” type=”s:string”/>
<s:element minOccurs=”0″ maxOccurs=”1″ name=”email” type=”s:string”/>
<s:element minOccurs=”0″ maxOccurs=”1″ name=”fullName” type=”s:string”/>
<s:element minOccurs=”0″ maxOccurs=”1″ name=”language” type=”s:string”/>
<s:element minOccurs=”0″ maxOccurs=”1″ name=”mobilePhone” type=”s:string”/>
<s:element minOccurs=”0″ maxOccurs=”1″ name=”password” type=”s:string”/>
<s:element minOccurs=”0″ maxOccurs=”1″ name=”phoneNumber” type=”s:string”/>
<s:element minOccurs=”1″ maxOccurs=”1″ name=”needsReset” type=”s:boolean”/>
<s:element minOccurs=”1″ maxOccurs=”1″ name=”trialIsActive” type=”s:boolean”/>
<s:element minOccurs=”1″ maxOccurs=”1″ name=”trialDays” type=”s:int”/>
<s:element minOccurs=”1″ maxOccurs=”1″ name=”trialSending” type=”s:int”/>
<s:element minOccurs=”1″ maxOccurs=”1″ name=”trialActions” type=”s:int”/>
<s:element minOccurs=”1″ maxOccurs=”1″ name=”trialRecipients” type=”s:int”/>
</s:sequence>
</s:complexType>
</s:element>
<s:element name=”Accounts_CreateTrialAccountResponse”>
<s:complexType>
<s:sequence>
<s:element minOccurs=”1″ maxOccurs=”1″ ref=”s1:Accounts_CreateTrialAccountResult”/>
</s:sequence>
</s:complexType>
</s:element>
<s:element name=”SecHeader” type=”tns:SecHeader”/>
<s:complexType name=”SecHeader”>
<s:sequence>
<s:element minOccurs=”0″ maxOccurs=”1″ name=”username” type=”s:string”/>
<s:element minOccurs=”0″ maxOccurs=”1″ name=”pass” type=”s:string”/>
</s:sequence>
<s:anyAttribute/>
</s:complexType>

this what i put in root element on 3rd party panel Accounts_CreateTrialAccount/SecHeader/

this what i put in post headers
Content-Type=s:string&UserName = “TrialAccounts”&Password = “”

i got internal server error 500

what do i do wrong?

thank you

https://ww.wp.xz.cn/plugins/forms-3rd-party-xpost/