Scriptcase 5.2 e PHP 5.3.28

Bom dia pessoal

O pessoal do meu provedor realizou uma manutenção no PHP, instalando o PHP Version 5.3.28.
Após isso o scriptcase 5.2 e minhas aplicações pararam de funcionar.
Existem incompatibilidades entre os 2?
Alguma coisa que eu possa realizar?

Obrigado

Estou tendo a seguinte mensagem:

Zend Optimizer not installed

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