deploying error

[agustin koll]

Hello, I have this deploying error:

[standalone@localhost:9990 /] deploy C:\Users\radiologia\Desktop\dcm4chee-arc.ea

r

{"WFLYCTL0062: Composite operation failed and was rolled back. Steps that failed

:" => {"Operation step-2" => {"WFLYCTL0080: Failed services" => {"jboss.persiste

nceunit.\"dcm4chee-arc.ear#dcm4chee-arc\"" => "org.jboss.msc.service.StartExcept

ion in service jboss.persistenceunit.\"dcm4chee-arc.ear#dcm4chee-arc\": org.hibe

rnate.service.spi.ServiceException: Unable to create requested service [org.hibe

rnate.engine.jdbc.env.spi.JdbcEnvironment]

    Caused by: org.hibernate.service.spi.ServiceException: Unable to create requ

ested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]

    Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo

 cannot be null when 'hibernate.dialect' not set"},"WFLYCTL0412: Required servic

es that are not installed:" => ["jboss.persistenceunit.\"dcm4chee-arc.ear#dcm4ch

ee-arc\""],"WFLYCTL0180: Services with missing/unavailable dependencies" => unde

fined}}}

Someone can help me ? I am following the steps and I dont know what I am doing wrong