prestashop webservices create order

I'm trying to create order in Prestashop 1.6.0.14. Client, address, carsare created successful but I can't create order and don't know why. Here is code for order creation:

$webService = new PrestaShopWebservice(PS_SHOP_PATH, PS_WS_AUTH_KEY, DEBUG);
$xml = new SimpleXMLElement($psXML);
$opt = array( 'resource' => 'orders' );
$opt['postXml'] = $xml->asXML();
$xml = $webService->add( $opt );

and here is XML Im passing:

<?xml version="1.0" encoding="UTF-8"?>
<prestashop>
<order>
  <id_address_delivery>175</id_address_delivery>
  <id_cart>286</id_cart>
  <id_currency>1</id_currency>
  <id_lang>1</id_lang>
  <id_customer>191</id_customer>
  <id_carrier>8</id_carrier>
  <current_state>14</current_state>
  <module>Bankwire</module>
  <date_add>2015-04-18 11:04:42</date_add>
  <id_shop_group>1</id_shop_group>
  <id_shop>1</id_shop>
  <payment>przelew na konto</payment>
  <total_discounts>0.00</total_discounts>
    <total_discounts_tax_incl>0.00</total_discounts_tax_incl>
    <total_discounts_tax_excl>0.00</total_discounts_tax_excl>
    <total_paid>60.5</total_paid>
    <total_paid_tax_incl>60.5</total_paid_tax_incl>
    <total_paid_tax_excl>46.2</total_paid_tax_excl>
    <total_paid_real>60.5</total_paid_real>
    <total_products>44</total_products>
    <total_products_wt>44</total_products_wt>
    <total_shipping>16</total_shipping>
    <total_shipping_tax_incl>16</total_shipping_tax_incl>
    <total_shipping_tax_excl>12.32</total_shipping_tax_excl>
    <carrier_tax_rate>1</carrier_tax_rate>
    <total_wrapping>0.00</total_wrapping>
    <total_wrapping_tax_incl>0.00</total_wrapping_tax_incl>
    <total_wrapping_tax_excl>0.00</total_wrapping_tax_excl>
    <round_mode>2</round_mode>

</order>
</prestashop>

Im getting error:

Internal error. To see this error please display the PHP errors.

Other error

This call to PrestaShop Web Services failed and returned an HTTP status of 400.

That means: Bad Request.

Can anybody help mi with that? I'm searching help on google, forums, stack, and nothing. I really need this to finally be able to import orders from allegro to prestashop.