I find the solution...
http://developer.searchmarketing.yahoo.com/docs/V7/reference/services/BudgetingS\
ervice.php#updateAccountDailySpendLimit

the document is error

the second parameter "limit" should be "spendLimit"

WSDL about updateAccountDailySpendLimit:

<xsd:element name="updateAccountDailySpendLimit">
<xsd:complexType>
<xsd:sequence>
<xsd:element maxOccurs="1" minOccurs="1" name="accountID" nillable="true"
type="xsd:string"/>
<xsd:element maxOccurs="1" minOccurs="1" name="spendLimit" nillable="true"
type="tns:SpendLimit"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>

Oscar

--- In yws-searchmarketing@yahoogroups.com, "jdephix" <jdephix@...> wrote:
>
> Just dumping ideas:
>
> Are you accessing US/Canada based accounts? If so read this for more info:
http://developer.searchmarketing.yahoo.com/announcements.php
>
> Can you post some code so we can try to reproduce errors?
>
> Make sure headers are properly set (auth).
>
> glhf :)
>
> --- In yws-searchmarketing@yahoogroups.com, "geniusking.tw" <cltsai@> wrote:
> >
> > Hello, I use BudgetingService updateAccountDailySpendLimit to update the
account's daily budget. There is no response and the update is fail!
> >
> > does anybody can use this method to update successfully?? Thanks.
>