Exception while trying to use Secure Conversation

[Fernando]

The exception is raised in the following line of the code:
SecurityContextToken sct
= client.IssueSecurityContextTokenAuthenticated(toke n, issuerToken);
The exception is the following:
uncontrolled exception of type 'System.Web.Services.Protocols.SoapException'
en microsoft.web.services2.dll

additional information: System.Web.Services.Protocols.SoapHeaderException:
Server unavailable, please try later --->
System.Configuration.ConfigurationException: WSE032: There was an error
loading the microsoft.web.services2 configuration section. --->
System.Configuration.ConfigurationException: WSE040: Type
WSSecureConvService.CustomUsernameTokenManager, WSSecureConvService could not
be loaded. Please check the configuration file.
at System.Web.Configuration.HttpConfigurationRecord.E valuate(String
configKey, SectionRecord section)
at System.Web.Configuration.HttpConfigurationRecord.G etConfig(String
configKey, Boolean cacheResult)
at System.Web.Configuration.HttpConfigurationRecord.G etConfig(String
configKey, Boolean cacheResult)
at System.Web.HttpContext.GetConfig(String name)
at
System.Web.Configuration.HttpConfigurationSystemBa se.System.Configuration.IConfigurationSystem.GetCo nfig(String configKey)
at System.Configuration.ConfigurationSettings.GetConf ig(String sectionName)
at
Microsoft.Web.Services2.Configuration.WebServicesC onfiguration.Initialize()

Any help will be great.
Thanks.

[Fernando]

I found the problem... it was this line in the configuration file:
<securityTokenManager type="LaboratorioContracts.CustomUsernameTokenMana ger,
LaboratorioContracts"
xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" qname="wsse:UsernameToken" />

It had old reference (from where i took the example).
But, now i have a new problem... :(

System.Web.Services.Protocols.SoapHeaderException: Server unavailable,
please try later ---> System.InvalidOperationException: Private Key is not
available
at
Microsoft.Web.Services2.Security.Cryptography.RSAC ryptoServiceProvider.Decrypt(Byte[] ciphertext, Boolean useOAEP)
at
Microsoft.Web.Services2.Security.Cryptography.RSA1 5KeyExchangeFormatter.DecryptKey(Byte[] cipherKey)
at Microsoft.Web.Services2.Security.EncryptedKey.Decr ypt()
at Microsoft.Web.Services2.Security.Security.LoadXml( XmlElement element)
at
Microsoft.Web.Services2.Security.SecurityInputFilt er.ProcessMessage(SoapEnvelope envelope)
at Microsoft.Web.Services2.Pipeline.ProcessInputMessa ge(SoapEnvelope
envelope)
at
Microsoft.Web.Services2.WebServicesExtension.Befor eDeserializeServer(SoapServerMessage message)