I trying to send a payment by PayPal but I receive error.

Most likely, the error you receive from PayPal is 10417.
This is from PayPal and cannot fix it at our end.
But this could be fixed when you change a funding source
with Preapproved Payment to our company.
This is explaination for US Paypal interface.
It could be different for other countries.
New Profile interfaces:
1) Log into PayPal and click on Profile
2) When viewing the New Profile, click on My Money (left hand navigation)
3) Click Edit next to My Preapproved Payments
(right hand main column towards the bottom)
4) Click on Crescent Trading Inc from the list of preapproved merchants
5) Make changes to choose what Funding Sources you would like to use
For Primary Funding Source is PayPal Balance.
It cannot be changed under Paypal's policy.
For Backup Funding Source,
if it is not specified, please choose credit card or bank account.
For Classic Profile interfaces:
1) Log into PayPal and click on Profile
2) When viewing the Classic Profile, look for the second/middle column
that says Financial Information
3) Look down the list and click on My Preapproved Payments
4) Click on Crescent Trading Inc from the list of preapproved merchants
5) Make changes to choose what Funding Sources you would like to use
For Primary Funding Source is PayPal Balance.
It cannot be changed under Paypal's policy.
For Backup Funding Source,
if it is not specified, please choose credit card or bank account.
There could be different reasons.
If you still cannot solve the problem, please contact us from Contact Board.