Access Webservices from web-enabled infopathforms from vsta code

[Andrej]

hi,

i have a webenabled infopath form. i would like to write the values of this
form into a database and retrive an id.

web-enabled infopath forms are not able to write to the database directly so
i developed a webservice which write the data into the database.

infopath dataconnections cannot return a response from the webservice so i
am trying to access this webservice from my vsta sourcecode.

while i am trying to send data to the webservice i get an
system.net.webpermission exception.

how can i access a webservice from vsta code in infopath.

thank you